Chicago Teen Fatally Shot By Masked Gunman In McDonald's Parking Lot, 3 Other Teens Hurt

A 17-year-old boy was fatally shot and three other teens were wounded after a masked gunman opened fire at a McDonald's parking lot on Chicago's North Side on Wednesday afternoon.

Killed in the shooting at the fast food restaurant in the 6700 block of North Clark Street in the city's Rogers Park neighborhood was Markeyo Carr, DNAinfo Chicago reports. Carr was shot in the head and pronounced dead at the scene.

A 15-year-old girl who stumbled into the restaurant's bathroom was shot multiple times and an 18-year-old man was shot in the back. Both were hospitalized in serious condition. The fourth teen, another 18-year-old man, was shot in the arm and last listed in "stable" condition at an area hospital, police officials told DNAinfo.

According to CBS Chicago, an argument between the victims and another group of young people preceded the shooting.

Carr was described by WGN as an "A" and "B" student who was also a member of his school's swim team.

While gangs had been feuding in the area, anti-violence group CeaseFire told ABC Chicago they recently helped broker a treaty between the rival gangs and said they did not believe gang activity was to blame for the Wednesday shooting, though police officials told the Chicago Sun-Times two of the male shooting victims were affiliated with gangs. Conflicting media reports claim none of the victims were gang-affiliated.

Following the shooting, Sullivan High School, located just two blocks from the restaurant, was put on lockdown for about a half hour Thursday, according to the Chicago Tribune.

The shooting comes on the heels of news that Chicago saw a 50-percent decrease in homicides in January 2014 compared to the same month the previous year.

No one is in police custody as of Thursday morning and police have yet to release a description of any suspects.